drivers/clk/zynq/clkc.c

   1 /*
   2  * Zynq clock controller
   3  *
   4  *  Copyright (C) 2012 - 2013 Xilinx
   5  *
   6  *  Sören Brinkmann <soren.brinkmann@xilinx.com>
   7  *
   8  * This program is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License v2 as published by
  10  * the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <linux/clk/zynq.h>
  22 #include <linux/clk-provider.h>
  23 #include <linux/of.h>
  24 #include <linux/of_address.h>
  25 #include <linux/slab.h>
  26 #include <linux/string.h>
  27 #include <linux/io.h>
  28
  29 static void __iomem *zynq_clkc_base;
  30
  31 #define SLCR_ARMPLL_CTRL                (zynq_clkc_base + 0x00)
  32 #define SLCR_DDRPLL_CTRL                (zynq_clkc_base + 0x04)
  33 #define SLCR_IOPLL_CTRL                 (zynq_clkc_base + 0x08)
  34 #define SLCR_PLL_STATUS                 (zynq_clkc_base + 0x0c)
  35 #define SLCR_ARM_CLK_CTRL               (zynq_clkc_base + 0x20)
  36 #define SLCR_DDR_CLK_CTRL               (zynq_clkc_base + 0x24)
  37 #define SLCR_DCI_CLK_CTRL               (zynq_clkc_base + 0x28)
  38 #define SLCR_APER_CLK_CTRL              (zynq_clkc_base + 0x2c)
  39 #define SLCR_GEM0_CLK_CTRL              (zynq_clkc_base + 0x40)
  40 #define SLCR_GEM1_CLK_CTRL              (zynq_clkc_base + 0x44)
  41 #define SLCR_SMC_CLK_CTRL               (zynq_clkc_base + 0x48)
  42 #define SLCR_LQSPI_CLK_CTRL             (zynq_clkc_base + 0x4c)
  43 #define SLCR_SDIO_CLK_CTRL              (zynq_clkc_base + 0x50)
  44 #define SLCR_UART_CLK_CTRL              (zynq_clkc_base + 0x54)
  45 #define SLCR_SPI_CLK_CTRL               (zynq_clkc_base + 0x58)
  46 #define SLCR_CAN_CLK_CTRL               (zynq_clkc_base + 0x5c)
  47 #define SLCR_CAN_MIOCLK_CTRL            (zynq_clkc_base + 0x60)
  48 #define SLCR_DBG_CLK_CTRL               (zynq_clkc_base + 0x64)
  49 #define SLCR_PCAP_CLK_CTRL              (zynq_clkc_base + 0x68)
  50 #define SLCR_FPGA0_CLK_CTRL             (zynq_clkc_base + 0x70)
  51 #define SLCR_621_TRUE                   (zynq_clkc_base + 0xc4)
  52 #define SLCR_SWDT_CLK_SEL               (zynq_clkc_base + 0x204)
  53
  54 #define NUM_MIO_PINS    54
  55
  56 #define DBG_CLK_CTRL_CLKACT_TRC         BIT(0)
  57 #define DBG_CLK_CTRL_CPU_1XCLKACT       BIT(1)
  58
  59 enum zynq_clk {
  60         armpll, ddrpll, iopll,
  61         cpu_6or4x, cpu_3or2x, cpu_2x, cpu_1x,
  62         ddr2x, ddr3x, dci,
  63         lqspi, smc, pcap, gem0, gem1, fclk0, fclk1, fclk2, fclk3, can0, can1,
  64         sdio0, sdio1, uart0, uart1, spi0, spi1, dma,
  65         usb0_aper, usb1_aper, gem0_aper, gem1_aper,
  66         sdio0_aper, sdio1_aper, spi0_aper, spi1_aper, can0_aper, can1_aper,
  67         i2c0_aper, i2c1_aper, uart0_aper, uart1_aper, gpio_aper, lqspi_aper,
  68         smc_aper, swdt, dbg_trc, dbg_apb, clk_max};
  69
  70 static struct clk *ps_clk;
  71 static struct clk *clks[clk_max];
  72 static struct clk_onecell_data clk_data;
  73
  74 static DEFINE_SPINLOCK(armpll_lock);
  75 static DEFINE_SPINLOCK(ddrpll_lock);
  76 static DEFINE_SPINLOCK(iopll_lock);
  77 static DEFINE_SPINLOCK(armclk_lock);
  78 static DEFINE_SPINLOCK(swdtclk_lock);
  79 static DEFINE_SPINLOCK(ddrclk_lock);
  80 static DEFINE_SPINLOCK(dciclk_lock);
  81 static DEFINE_SPINLOCK(gem0clk_lock);
  82 static DEFINE_SPINLOCK(gem1clk_lock);
  83 static DEFINE_SPINLOCK(canclk_lock);
  84 static DEFINE_SPINLOCK(canmioclk_lock);
  85 static DEFINE_SPINLOCK(dbgclk_lock);
  86 static DEFINE_SPINLOCK(aperclk_lock);
  87
  88 static const char *const armpll_parents[] __initconst = {"armpll_int",
  89         "ps_clk"};
  90 static const char *const ddrpll_parents[] __initconst = {"ddrpll_int",
  91         "ps_clk"};
  92 static const char *const iopll_parents[] __initconst = {"iopll_int",
  93         "ps_clk"};
  94 static const char *gem0_mux_parents[] __initdata = {"gem0_div1", "dummy_name"};
  95 static const char *gem1_mux_parents[] __initdata = {"gem1_div1", "dummy_name"};
  96 static const char *const can0_mio_mux2_parents[] __initconst = {"can0_gate",
  97         "can0_mio_mux"};
  98 static const char *const can1_mio_mux2_parents[] __initconst = {"can1_gate",
  99         "can1_mio_mux"};
 100 static const char *dbg_emio_mux_parents[] __initdata = {"dbg_div",
 101         "dummy_name"};
 102
 103 static const char *const dbgtrc_emio_input_names[] __initconst = {
 104         "trace_emio_clk"};
 105 static const char *const gem0_emio_input_names[] __initconst = {
 106         "gem0_emio_clk"};
 107 static const char *const gem1_emio_input_names[] __initconst = {
 108         "gem1_emio_clk"};
 109 static const char *const swdt_ext_clk_input_names[] __initconst = {
 110         "swdt_ext_clk"};
 111
 112 static void __init zynq_clk_register_fclk(enum zynq_clk fclk,
 113                 const char *clk_name, void __iomem *fclk_ctrl_reg,
 114                 const char **parents, int enable)
 115 {
 116         struct clk *clk;
 117         u32 enable_reg;
 118         char *mux_name;
 119         char *div0_name;
 120         char *div1_name;
 121         spinlock_t *fclk_lock;
 122         spinlock_t *fclk_gate_lock;
 123         void __iomem *fclk_gate_reg = fclk_ctrl_reg + 8;
 124
 125         fclk_lock = kmalloc(sizeof(*fclk_lock), GFP_KERNEL);
 126         if (!fclk_lock)
 127                 goto err;
 128         fclk_gate_lock = kmalloc(sizeof(*fclk_gate_lock), GFP_KERNEL);
 129         if (!fclk_gate_lock)
 130                 goto err_fclk_gate_lock;
 131         spin_lock_init(fclk_lock);
 132         spin_lock_init(fclk_gate_lock);
 133
 134         mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name);
 135         if (!mux_name)
 136                 goto err_mux_name;
 137         div0_name = kasprintf(GFP_KERNEL, "%s_div0", clk_name);
 138         if (!div0_name)
 139                 goto err_div0_name;
 140         div1_name = kasprintf(GFP_KERNEL, "%s_div1", clk_name);
 141         if (!div1_name)
 142                 goto err_div1_name;
 143
 144         clk = clk_register_mux(NULL, mux_name, parents, 4,
 145                         CLK_SET_RATE_NO_REPARENT, fclk_ctrl_reg, 4, 2, 0,
 146                         fclk_lock);
 147
 148         clk = clk_register_divider(NULL, div0_name, mux_name,
 149                         0, fclk_ctrl_reg, 8, 6, CLK_DIVIDER_ONE_BASED |
 150                         CLK_DIVIDER_ALLOW_ZERO, fclk_lock);
 151
 152         clk = clk_register_divider(NULL, div1_name, div0_name,
 153                         CLK_SET_RATE_PARENT, fclk_ctrl_reg, 20, 6,
 154                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 155                         fclk_lock);
 156
 157         clks[fclk] = clk_register_gate(NULL, clk_name,
 158                         div1_name, CLK_SET_RATE_PARENT, fclk_gate_reg,
 159                         0, CLK_GATE_SET_TO_DISABLE, fclk_gate_lock);
 160         enable_reg = clk_readl(fclk_gate_reg) & 1;
 161         if (enable && !enable_reg) {
 162                 if (clk_prepare_enable(clks[fclk]))
 163                         pr_warn("%s: FCLK%u enable failed\n", __func__,
 164                                         fclk - fclk0);
 165         }
 166         kfree(mux_name);
 167         kfree(div0_name);
 168         kfree(div1_name);
 169
 170         return;
 171
 172 err_div1_name:
 173         kfree(div0_name);
 174 err_div0_name:
 175         kfree(mux_name);
 176 err_mux_name:
 177         kfree(fclk_gate_lock);
 178 err_fclk_gate_lock:
 179         kfree(fclk_lock);
 180 err:
 181         clks[fclk] = ERR_PTR(-ENOMEM);
 182 }
 183
 184 static void __init zynq_clk_register_periph_clk(enum zynq_clk clk0,
 185                 enum zynq_clk clk1, const char *clk_name0,
 186                 const char *clk_name1, void __iomem *clk_ctrl,
 187                 const char **parents, unsigned int two_gates)
 188 {
 189         struct clk *clk;
 190         char *mux_name;
 191         char *div_name;
 192         spinlock_t *lock;
 193
 194         lock = kmalloc(sizeof(*lock), GFP_KERNEL);
 195         if (!lock)
 196                 goto err;
 197         spin_lock_init(lock);
 198
 199         mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name0);
 200         div_name = kasprintf(GFP_KERNEL, "%s_div", clk_name0);
 201
 202         clk = clk_register_mux(NULL, mux_name, parents, 4,
 203                         CLK_SET_RATE_NO_REPARENT, clk_ctrl, 4, 2, 0, lock);
 204
 205         clk = clk_register_divider(NULL, div_name, mux_name, 0, clk_ctrl, 8, 6,
 206                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, lock);
 207
 208         clks[clk0] = clk_register_gate(NULL, clk_name0, div_name,
 209                         CLK_SET_RATE_PARENT, clk_ctrl, 0, 0, lock);
 210         if (two_gates)
 211                 clks[clk1] = clk_register_gate(NULL, clk_name1, div_name,
 212                                 CLK_SET_RATE_PARENT, clk_ctrl, 1, 0, lock);
 213
 214         kfree(mux_name);
 215         kfree(div_name);
 216
 217         return;
 218
 219 err:
 220         clks[clk0] = ERR_PTR(-ENOMEM);
 221         if (two_gates)
 222                 clks[clk1] = ERR_PTR(-ENOMEM);
 223 }
 224
 225 static void __init zynq_clk_setup(struct device_node *np)
 226 {
 227         int i;
 228         u32 tmp;
 229         int ret;
 230         struct clk *clk;
 231         char *clk_name;
 232         unsigned int fclk_enable = 0;
 233         const char *clk_output_name[clk_max];
 234         const char *cpu_parents[4];
 235         const char *periph_parents[4];
 236         const char *swdt_ext_clk_mux_parents[2];
 237         const char *can_mio_mux_parents[NUM_MIO_PINS];
 238         const char *dummy_nm = "dummy_name";
 239
 240         pr_info("Zynq clock init\n");
 241
 242         /* get clock output names from DT */
 243         for (i = 0; i < clk_max; i++) {
 244                 if (of_property_read_string_index(np, "clock-output-names",
 245                                   i, &clk_output_name[i])) {
 246                         pr_err("%s: clock output name not in DT\n", __func__);
 247                         BUG();
 248                 }
 249         }
 250         cpu_parents[0] = clk_output_name[armpll];
 251         cpu_parents[1] = clk_output_name[armpll];
 252         cpu_parents[2] = clk_output_name[ddrpll];
 253         cpu_parents[3] = clk_output_name[iopll];
 254         periph_parents[0] = clk_output_name[iopll];
 255         periph_parents[1] = clk_output_name[iopll];
 256         periph_parents[2] = clk_output_name[armpll];
 257         periph_parents[3] = clk_output_name[ddrpll];
 258
 259         of_property_read_u32(np, "fclk-enable", &fclk_enable);
 260
 261         /* ps_clk */
 262         ret = of_property_read_u32(np, "ps-clk-frequency", &tmp);
 263         if (ret) {
 264                 pr_warn("ps_clk frequency not specified, using 33 MHz.\n");
 265                 tmp = 33333333;
 266         }
 267         ps_clk = clk_register_fixed_rate(NULL, "ps_clk", NULL, CLK_IS_ROOT,
 268                         tmp);
 269
 270         /* PLLs */
 271         clk = clk_register_zynq_pll("armpll_int", "ps_clk", SLCR_ARMPLL_CTRL,
 272                         SLCR_PLL_STATUS, 0, &armpll_lock);
 273         clks[armpll] = clk_register_mux(NULL, clk_output_name[armpll],
 274                         armpll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 275                         SLCR_ARMPLL_CTRL, 4, 1, 0, &armpll_lock);
 276
 277         clk = clk_register_zynq_pll("ddrpll_int", "ps_clk", SLCR_DDRPLL_CTRL,
 278                         SLCR_PLL_STATUS, 1, &ddrpll_lock);
 279         clks[ddrpll] = clk_register_mux(NULL, clk_output_name[ddrpll],
 280                         ddrpll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 281                         SLCR_DDRPLL_CTRL, 4, 1, 0, &ddrpll_lock);
 282
 283         clk = clk_register_zynq_pll("iopll_int", "ps_clk", SLCR_IOPLL_CTRL,
 284                         SLCR_PLL_STATUS, 2, &iopll_lock);
 285         clks[iopll] = clk_register_mux(NULL, clk_output_name[iopll],
 286                         iopll_parents, 2, CLK_SET_RATE_NO_REPARENT,
 287                         SLCR_IOPLL_CTRL, 4, 1, 0, &iopll_lock);
 288
 289         /* CPU clocks */
 290         tmp = clk_readl(SLCR_621_TRUE) & 1;
 291         clk = clk_register_mux(NULL, "cpu_mux", cpu_parents, 4,
 292                         CLK_SET_RATE_NO_REPARENT, SLCR_ARM_CLK_CTRL, 4, 2, 0,
 293                         &armclk_lock);
 294         clk = clk_register_divider(NULL, "cpu_div", "cpu_mux", 0,
 295                         SLCR_ARM_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 296                         CLK_DIVIDER_ALLOW_ZERO, &armclk_lock);
 297
 298         clks[cpu_6or4x] = clk_register_gate(NULL, clk_output_name[cpu_6or4x],
 299                         "cpu_div", CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
 300                         SLCR_ARM_CLK_CTRL, 24, 0, &armclk_lock);
 301
 302         clk = clk_register_fixed_factor(NULL, "cpu_3or2x_div", "cpu_div", 0,
 303                         1, 2);
 304         clks[cpu_3or2x] = clk_register_gate(NULL, clk_output_name[cpu_3or2x],
 305                         "cpu_3or2x_div", CLK_IGNORE_UNUSED,
 306                         SLCR_ARM_CLK_CTRL, 25, 0, &armclk_lock);
 307
 308         clk = clk_register_fixed_factor(NULL, "cpu_2x_div", "cpu_div", 0, 1,
 309                         2 + tmp);
 310         clks[cpu_2x] = clk_register_gate(NULL, clk_output_name[cpu_2x],
 311                         "cpu_2x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL,
 312                         26, 0, &armclk_lock);
 313         clk_prepare_enable(clks[cpu_2x]);
 314
 315         clk = clk_register_fixed_factor(NULL, "cpu_1x_div", "cpu_div", 0, 1,
 316                         4 + 2 * tmp);
 317         clks[cpu_1x] = clk_register_gate(NULL, clk_output_name[cpu_1x],
 318                         "cpu_1x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL, 27,
 319                         0, &armclk_lock);
 320
 321         /* Timers */
 322         swdt_ext_clk_mux_parents[0] = clk_output_name[cpu_1x];
 323         for (i = 0; i < ARRAY_SIZE(swdt_ext_clk_input_names); i++) {
 324                 int idx = of_property_match_string(np, "clock-names",
 325                                 swdt_ext_clk_input_names[i]);
 326                 if (idx >= 0)
 327                         swdt_ext_clk_mux_parents[i + 1] =
 328                                 of_clk_get_parent_name(np, idx);
 329                 else
 330                         swdt_ext_clk_mux_parents[i + 1] = dummy_nm;
 331         }
 332         clks[swdt] = clk_register_mux(NULL, clk_output_name[swdt],
 333                         swdt_ext_clk_mux_parents, 2, CLK_SET_RATE_PARENT |
 334                         CLK_SET_RATE_NO_REPARENT, SLCR_SWDT_CLK_SEL, 0, 1, 0,
 335                         &swdtclk_lock);
 336
 337         /* DDR clocks */
 338         clk = clk_register_divider(NULL, "ddr2x_div", "ddrpll", 0,
 339                         SLCR_DDR_CLK_CTRL, 26, 6, CLK_DIVIDER_ONE_BASED |
 340                         CLK_DIVIDER_ALLOW_ZERO, &ddrclk_lock);
 341         clks[ddr2x] = clk_register_gate(NULL, clk_output_name[ddr2x],
 342                         "ddr2x_div", 0, SLCR_DDR_CLK_CTRL, 1, 0, &ddrclk_lock);
 343         clk_prepare_enable(clks[ddr2x]);
 344         clk = clk_register_divider(NULL, "ddr3x_div", "ddrpll", 0,
 345                         SLCR_DDR_CLK_CTRL, 20, 6, CLK_DIVIDER_ONE_BASED |
 346                         CLK_DIVIDER_ALLOW_ZERO, &ddrclk_lock);
 347         clks[ddr3x] = clk_register_gate(NULL, clk_output_name[ddr3x],
 348                         "ddr3x_div", 0, SLCR_DDR_CLK_CTRL, 0, 0, &ddrclk_lock);
 349         clk_prepare_enable(clks[ddr3x]);
 350
 351         clk = clk_register_divider(NULL, "dci_div0", "ddrpll", 0,
 352                         SLCR_DCI_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 353                         CLK_DIVIDER_ALLOW_ZERO, &dciclk_lock);
 354         clk = clk_register_divider(NULL, "dci_div1", "dci_div0",
 355                         CLK_SET_RATE_PARENT, SLCR_DCI_CLK_CTRL, 20, 6,
 356                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 357                         &dciclk_lock);
 358         clks[dci] = clk_register_gate(NULL, clk_output_name[dci], "dci_div1",
 359                         CLK_SET_RATE_PARENT, SLCR_DCI_CLK_CTRL, 0, 0,
 360                         &dciclk_lock);
 361         clk_prepare_enable(clks[dci]);
 362
 363         /* Peripheral clocks */
 364         for (i = fclk0; i <= fclk3; i++) {
 365                 int enable = !!(fclk_enable & BIT(i - fclk0));
 366                 zynq_clk_register_fclk(i, clk_output_name[i],
 367                                 SLCR_FPGA0_CLK_CTRL + 0x10 * (i - fclk0),
 368                                 periph_parents, enable);
 369         }
 370
 371         zynq_clk_register_periph_clk(lqspi, 0, clk_output_name[lqspi], NULL,
 372                         SLCR_LQSPI_CLK_CTRL, periph_parents, 0);
 373
 374         zynq_clk_register_periph_clk(smc, 0, clk_output_name[smc], NULL,
 375                         SLCR_SMC_CLK_CTRL, periph_parents, 0);
 376
 377         zynq_clk_register_periph_clk(pcap, 0, clk_output_name[pcap], NULL,
 378                         SLCR_PCAP_CLK_CTRL, periph_parents, 0);
 379
 380         zynq_clk_register_periph_clk(sdio0, sdio1, clk_output_name[sdio0],
 381                         clk_output_name[sdio1], SLCR_SDIO_CLK_CTRL,
 382                         periph_parents, 1);
 383
 384         zynq_clk_register_periph_clk(uart0, uart1, clk_output_name[uart0],
 385                         clk_output_name[uart1], SLCR_UART_CLK_CTRL,
 386                         periph_parents, 1);
 387
 388         zynq_clk_register_periph_clk(spi0, spi1, clk_output_name[spi0],
 389                         clk_output_name[spi1], SLCR_SPI_CLK_CTRL,
 390                         periph_parents, 1);
 391
 392         for (i = 0; i < ARRAY_SIZE(gem0_emio_input_names); i++) {
 393                 int idx = of_property_match_string(np, "clock-names",
 394                                 gem0_emio_input_names[i]);
 395                 if (idx >= 0)
 396                         gem0_mux_parents[i + 1] = of_clk_get_parent_name(np,
 397                                         idx);
 398         }
 399         clk = clk_register_mux(NULL, "gem0_mux", periph_parents, 4,
 400                         CLK_SET_RATE_NO_REPARENT, SLCR_GEM0_CLK_CTRL, 4, 2, 0,
 401                         &gem0clk_lock);
 402         clk = clk_register_divider(NULL, "gem0_div0", "gem0_mux", 0,
 403                         SLCR_GEM0_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 404                         CLK_DIVIDER_ALLOW_ZERO, &gem0clk_lock);
 405         clk = clk_register_divider(NULL, "gem0_div1", "gem0_div0",
 406                         CLK_SET_RATE_PARENT, SLCR_GEM0_CLK_CTRL, 20, 6,
 407                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 408                         &gem0clk_lock);
 409         clk = clk_register_mux(NULL, "gem0_emio_mux", gem0_mux_parents, 2,
 410                         CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
 411                         SLCR_GEM0_CLK_CTRL, 6, 1, 0,
 412                         &gem0clk_lock);
 413         clks[gem0] = clk_register_gate(NULL, clk_output_name[gem0],
 414                         "gem0_emio_mux", CLK_SET_RATE_PARENT,
 415                         SLCR_GEM0_CLK_CTRL, 0, 0, &gem0clk_lock);
 416
 417         for (i = 0; i < ARRAY_SIZE(gem1_emio_input_names); i++) {
 418                 int idx = of_property_match_string(np, "clock-names",
 419                                 gem1_emio_input_names[i]);
 420                 if (idx >= 0)
 421                         gem1_mux_parents[i + 1] = of_clk_get_parent_name(np,
 422                                         idx);
 423         }
 424         clk = clk_register_mux(NULL, "gem1_mux", periph_parents, 4,
 425                         CLK_SET_RATE_NO_REPARENT, SLCR_GEM1_CLK_CTRL, 4, 2, 0,
 426                         &gem1clk_lock);
 427         clk = clk_register_divider(NULL, "gem1_div0", "gem1_mux", 0,
 428                         SLCR_GEM1_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 429                         CLK_DIVIDER_ALLOW_ZERO, &gem1clk_lock);
 430         clk = clk_register_divider(NULL, "gem1_div1", "gem1_div0",
 431                         CLK_SET_RATE_PARENT, SLCR_GEM1_CLK_CTRL, 20, 6,
 432                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 433                         &gem1clk_lock);
 434         clk = clk_register_mux(NULL, "gem1_emio_mux", gem1_mux_parents, 2,
 435                         CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
 436                         SLCR_GEM1_CLK_CTRL, 6, 1, 0,
 437                         &gem1clk_lock);
 438         clks[gem1] = clk_register_gate(NULL, clk_output_name[gem1],
 439                         "gem1_emio_mux", CLK_SET_RATE_PARENT,
 440                         SLCR_GEM1_CLK_CTRL, 0, 0, &gem1clk_lock);
 441
 442         tmp = strlen("mio_clk_00x");
 443         clk_name = kmalloc(tmp, GFP_KERNEL);
 444         for (i = 0; i < NUM_MIO_PINS; i++) {
 445                 int idx;
 446
 447                 snprintf(clk_name, tmp, "mio_clk_%2.2d", i);
 448                 idx = of_property_match_string(np, "clock-names", clk_name);
 449                 if (idx >= 0)
 450                         can_mio_mux_parents[i] = of_clk_get_parent_name(np,
 451                                                 idx);
 452                 else
 453                         can_mio_mux_parents[i] = dummy_nm;
 454         }
 455         kfree(clk_name);
 456         clk = clk_register_mux(NULL, "can_mux", periph_parents, 4,
 457                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_CLK_CTRL, 4, 2, 0,
 458                         &canclk_lock);
 459         clk = clk_register_divider(NULL, "can_div0", "can_mux", 0,
 460                         SLCR_CAN_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 461                         CLK_DIVIDER_ALLOW_ZERO, &canclk_lock);
 462         clk = clk_register_divider(NULL, "can_div1", "can_div0",
 463                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 20, 6,
 464                         CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
 465                         &canclk_lock);
 466         clk = clk_register_gate(NULL, "can0_gate", "can_div1",
 467                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 0, 0,
 468                         &canclk_lock);
 469         clk = clk_register_gate(NULL, "can1_gate", "can_div1",
 470                         CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 1, 0,
 471                         &canclk_lock);
 472         clk = clk_register_mux(NULL, "can0_mio_mux",
 473                         can_mio_mux_parents, 54, CLK_SET_RATE_PARENT |
 474                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 0, 6, 0,
 475                         &canmioclk_lock);
 476         clk = clk_register_mux(NULL, "can1_mio_mux",
 477                         can_mio_mux_parents, 54, CLK_SET_RATE_PARENT |
 478                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 16, 6,
 479                         0, &canmioclk_lock);
 480         clks[can0] = clk_register_mux(NULL, clk_output_name[can0],
 481                         can0_mio_mux2_parents, 2, CLK_SET_RATE_PARENT |
 482                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 6, 1, 0,
 483                         &canmioclk_lock);
 484         clks[can1] = clk_register_mux(NULL, clk_output_name[can1],
 485                         can1_mio_mux2_parents, 2, CLK_SET_RATE_PARENT |
 486                         CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 22, 1,
 487                         0, &canmioclk_lock);
 488
 489         for (i = 0; i < ARRAY_SIZE(dbgtrc_emio_input_names); i++) {
 490                 int idx = of_property_match_string(np, "clock-names",
 491                                 dbgtrc_emio_input_names[i]);
 492                 if (idx >= 0)
 493                         dbg_emio_mux_parents[i + 1] = of_clk_get_parent_name(np,
 494                                         idx);
 495         }
 496         clk = clk_register_mux(NULL, "dbg_mux", periph_parents, 4,
 497                         CLK_SET_RATE_NO_REPARENT, SLCR_DBG_CLK_CTRL, 4, 2, 0,
 498                         &dbgclk_lock);
 499         clk = clk_register_divider(NULL, "dbg_div", "dbg_mux", 0,
 500                         SLCR_DBG_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
 501                         CLK_DIVIDER_ALLOW_ZERO, &dbgclk_lock);
 502         clk = clk_register_mux(NULL, "dbg_emio_mux", dbg_emio_mux_parents, 2,
 503                         CLK_SET_RATE_NO_REPARENT, SLCR_DBG_CLK_CTRL, 6, 1, 0,
 504                         &dbgclk_lock);
 505         clks[dbg_trc] = clk_register_gate(NULL, clk_output_name[dbg_trc],
 506                         "dbg_emio_mux", CLK_SET_RATE_PARENT, SLCR_DBG_CLK_CTRL,
 507                         0, 0, &dbgclk_lock);
 508         clks[dbg_apb] = clk_register_gate(NULL, clk_output_name[dbg_apb],
 509                         clk_output_name[cpu_1x], 0, SLCR_DBG_CLK_CTRL, 1, 0,
 510                         &dbgclk_lock);
 511
 512         /* leave debug clocks in the state the bootloader set them up to */
 513         tmp = clk_readl(SLCR_DBG_CLK_CTRL);
 514         if (tmp & DBG_CLK_CTRL_CLKACT_TRC)
 515                 if (clk_prepare_enable(clks[dbg_trc]))
 516                         pr_warn("%s: trace clk enable failed\n", __func__);
 517         if (tmp & DBG_CLK_CTRL_CPU_1XCLKACT)
 518                 if (clk_prepare_enable(clks[dbg_apb]))
 519                         pr_warn("%s: debug APB clk enable failed\n", __func__);
 520
 521         /* One gated clock for all APER clocks. */
 522         clks[dma] = clk_register_gate(NULL, clk_output_name[dma],
 523                         clk_output_name[cpu_2x], 0, SLCR_APER_CLK_CTRL, 0, 0,
 524                         &aperclk_lock);
 525         clks[usb0_aper] = clk_register_gate(NULL, clk_output_name[usb0_aper],
 526                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 2, 0,
 527                         &aperclk_lock);
 528         clks[usb1_aper] = clk_register_gate(NULL, clk_output_name[usb1_aper],
 529                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 3, 0,
 530                         &aperclk_lock);
 531         clks[gem0_aper] = clk_register_gate(NULL, clk_output_name[gem0_aper],
 532                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 6, 0,
 533                         &aperclk_lock);
 534         clks[gem1_aper] = clk_register_gate(NULL, clk_output_name[gem1_aper],
 535                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 7, 0,
 536                         &aperclk_lock);
 537         clks[sdio0_aper] = clk_register_gate(NULL, clk_output_name[sdio0_aper],
 538                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 10, 0,
 539                         &aperclk_lock);
 540         clks[sdio1_aper] = clk_register_gate(NULL, clk_output_name[sdio1_aper],
 541                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 11, 0,
 542                         &aperclk_lock);
 543         clks[spi0_aper] = clk_register_gate(NULL, clk_output_name[spi0_aper],
 544                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 14, 0,
 545                         &aperclk_lock);
 546         clks[spi1_aper] = clk_register_gate(NULL, clk_output_name[spi1_aper],
 547                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 15, 0,
 548                         &aperclk_lock);
 549         clks[can0_aper] = clk_register_gate(NULL, clk_output_name[can0_aper],
 550                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 16, 0,
 551                         &aperclk_lock);
 552         clks[can1_aper] = clk_register_gate(NULL, clk_output_name[can1_aper],
 553                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 17, 0,
 554                         &aperclk_lock);
 555         clks[i2c0_aper] = clk_register_gate(NULL, clk_output_name[i2c0_aper],
 556                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 18, 0,
 557                         &aperclk_lock);
 558         clks[i2c1_aper] = clk_register_gate(NULL, clk_output_name[i2c1_aper],
 559                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 19, 0,
 560                         &aperclk_lock);
 561         clks[uart0_aper] = clk_register_gate(NULL, clk_output_name[uart0_aper],
 562                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 20, 0,
 563                         &aperclk_lock);
 564         clks[uart1_aper] = clk_register_gate(NULL, clk_output_name[uart1_aper],
 565                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 21, 0,
 566                         &aperclk_lock);
 567         clks[gpio_aper] = clk_register_gate(NULL, clk_output_name[gpio_aper],
 568                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 22, 0,
 569                         &aperclk_lock);
 570         clks[lqspi_aper] = clk_register_gate(NULL, clk_output_name[lqspi_aper],
 571                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 23, 0,
 572                         &aperclk_lock);
 573         clks[smc_aper] = clk_register_gate(NULL, clk_output_name[smc_aper],
 574                         clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 24, 0,
 575                         &aperclk_lock);
 576
 577         for (i = 0; i < ARRAY_SIZE(clks); i++) {
 578                 if (IS_ERR(clks[i])) {
 579                         pr_err("Zynq clk %d: register failed with %ld\n",
 580                                i, PTR_ERR(clks[i]));
 581                         BUG();
 582                 }
 583         }
 584
 585         clk_data.clks = clks;
 586         clk_data.clk_num = ARRAY_SIZE(clks);
 587         of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
 588 }
 589
 590 CLK_OF_DECLARE(zynq_clkc, "xlnx,ps7-clkc", zynq_clk_setup);
 591
 592 void __init zynq_clock_init(void)
 593 {
 594         struct device_node *np;
 595         struct device_node *slcr;
 596         struct resource res;
 597
 598         np = of_find_compatible_node(NULL, NULL, "xlnx,ps7-clkc");
 599         if (!np) {
 600                 pr_err("%s: clkc node not found\n", __func__);
 601                 goto np_err;
 602         }
 603
 604         if (of_address_to_resource(np, 0, &res)) {
 605                 pr_err("%s: failed to get resource\n", np->name);
 606                 goto np_err;
 607         }
 608
 609         slcr = of_get_parent(np);
 610
 611         if (slcr->data) {
 612                 zynq_clkc_base = (__force void __iomem *)slcr->data + res.start;
 613         } else {
 614                 pr_err("%s: Unable to get I/O memory\n", np->name);
 615                 of_node_put(slcr);
 616                 goto np_err;
 617         }
 618
 619         pr_info("%s: clkc starts at %p\n", __func__, zynq_clkc_base);
 620
 621         of_node_put(slcr);
 622         of_node_put(np);
 623
 624         return;
 625
 626 np_err:
 627         of_node_put(np);
 628         BUG();
 629 }